Safety device for gas-lamps.



P. HUTTBNLOGHBR. SAFETY DEVICE FOB GAS LAMPS. l QPPIIOATION FILED APR.16 ,`191 2.

1,038,893, y mna sept.17,1912.

f3.2 f 5?/ y;

.A f2 ff 0 yg o SAFETY DEVICE FOR GAS-LAMPS.

1,038,893. Original application led August 17,

Specification of Letters Yatent.

1911, SeriaLNo. 644,659. Divided and this applicatidn led April 15, v18112. Serial No. 690,749.

Patented sept, 17, 1912.

To all whom t may concern:

Be it known that I, FRIEDRICH HU'rrEN- LOGHER, a subject of the Kin of Wurttemberg, and resident of 29 (gervinusstrasse, Charlottenburg, near Berlin, Germany, have invented a new and useful Safety Device for Gas-Lamps, of which the following is a specication.

This invention relates to certain modifications of the safety-device for gas burners and the like, described in the specification of my concurrent United States patent application Serial No. 644659 tiled August 17th, 9 11, and constitutes subject-matter divided'out from said application.

In order that the invention'may be clearly understood, reference is made to the accompanying drawings, -whereon:'-

Figure 1 is a vertical section of the safety device showing the position of the parts im-l mediately after turning on vthe gasl cock. Fig.2 is a similar View showin the `device in its cut-oit' position. Fig. 3 1s a plan of Figs. 1 and 2Q tical section, a slight modification of Figs. 1 and 2, Fig. 4 showing the parts in the psition assumed, when the gas burner is vignited, and Fig. 5 showing the device in cutoff position.

The device shown in Figs. 1 to 3, which is particularly intended for use in conjunction with heating apparatus, 'such as cookers and hot water boilers, comprises a cylindrical tank 31 preferably made in two parts telescoped together .land a smaller lateral tank 32, the tanks 31 and 32 being separated by `a partition 66 extending almost to the 'floor of the tanks so las to leave a smallaperture 67 through which li uid canilow from one tank to the other. ithin the tankA 31 is arranged a bell 68 having apertures 69 in its crown and an annular trough-shaped float 70. "De endin from the crown of. the bell is a cap 71 whic is inverted over a cup 75 which is carried by a central pipek 74 d1- rectly connected to thefgas outlet connectionV 73 which in this case 1s arranged beneath' the apparatus, while the inlet gas connection 72 is arranged above' the apparatus. Depending into the side tank 32 is anair outlet tube 50 constrictedi at its upper end at 65 and opening at its lower end into the widened upp directed arms 52. and 53 in direct connection Figs. 4 and 5. show, in verv-4 4liquid in y upper part 51 until the outlet 'of air through er end 51 of a 'tube 54'which is' provided wlth upwardlyV and downwardlyV with the ytube 54.- The downwardly directed tubular 4arm 53 is open at its lower end .and communicates at its upper end with a tube 55 terminating at its other end in a thermostatic device 56 which in this case is shown as a closed cylindrical chamber. A

tube 76 extends downwardly from the cover passes a resetting device which comprises a rod 77 termina-ting lat its lower end 1n a ring of the tank 31 and through this tube 76 i 78, the rod 77 being in -slotted connection with a double-armed lever 81 pivoted to a bracket 80 on the tank 32, the lever 81 being under the action of a spring 79.

The operation of the foregoing construe: tion is as .follows If gas enters through the connection 7 2 into the tank 31, the level of liquid in the tank will be depressed by the .pressure of the as, causing the liquid t-o gradually escape t rough the small aper-` ture 67 into ing the bell 69 and float 70 from falling too rapidly. At the same -time air will escape throu h the throttling aperture 63 of thc air tu e 50 within the tank 32, while gas will pass through the aperture 69 in the. bell 68 and through the tube 74 to the outlet gas connection 73. The liquid and air-brake enables sufficient time to elapse for thegas to bevignited before the supply iscut off, and on the gas device 56 will come into operation and the expansion of the uid therein will cause the the tube 54 to rise in the enlarged 50 is cut off, thus preventing furthe pipe which at the same time prether exit of air,

'l the side tank 32, thus prevent- 'being ignited, the thermost-atic v vents liquid in the tank 31 from passing into the tank 32.v If however the 'gas is not 11gnited, or becomes extinguished without t e closing static device will not come into operatlon and consequently liquid will continue to pass from the tank 31 to the tank 32 until the bell 69 and float 70 sink to such an extent that the cap in the cup 75 whereupon the supply of gas will be cut oi. In order to su sequently light the burner, the this 'may be effected by depressing the free end of the lever 81 to raise the ring 7 8.

The device illustrated in Figs. 4 and 5 is vsimilar to that illustrated in Figs. 1 to 3,

gas inletconuection 34 are arranged beof the burner gas cock, the thermo- 1004 71 is immersed in theliquid bell must be lifted and v l38, 39 and 40 are provided.

low and above the apparatus respectively. In Figs. 4 and 5 moreover three inlet tubes Downwardly extending from the connection 34 is a tube 82 and between this tube and the gas inlet tube 40 is a cap 71, which in this case is supported in positionby means of bent wires -83 secured tothe float 70.

The resetting device in this casev is shown as comprising a dome 84 immersed inthe liquid in the t-ank 31, the dome 84 being carried bya spindle 86, having an operating knob 87, said spindle passing through a tube 88 and being held under' the action of a spring 85. Other- Wise the construction of the tanles 31 and 32 is similar to that illustra-ted at Figs. 1 to 3.

The operation of the foregoing device is as follows: If the burner cock in the piping leading to the connection 33 is opened, gas

will enter the tank 31 through the tubes 38, 39, 40 the gas entering through the tube 40 passinr through the gas connection 34 by way o the tube 71. The gas pressure in the tank 31 will cause the level of liquid therein to sink, the liquid passin through into the tank 32, as hereinbefore escribed with reference to Figs. 1 to 3 and air will be throttled in its escape through the opening of the pipe 50. The sinking of the oat will thus gradually take place and if the gas is ignited, the thermostatic device 56 will in the manner hereinbefore described raise the level of Water in the enlarged pipe level of liquid in the tank 31 will conse` quently fall and with it the float 70, until the cap 71 is immersed in the liquid in the' cup 75, thus cutting off, the 'supply of gas. To reset the device, the tube 84 is raised by pressing the spindle 86 upwardly, vvherel upon the dome Will be raised above the level of liquid in the tank 3T and'gas will enter the dome '84 so that the gas pressure Will be somewhat reduced and at the same time'the level of the liquid in the tank 31 slightly increased, sulicient to raise the float 70/and with it the' cap 71 above the levelv ofthe liquid in the cup whereupon as may again pass to the connection 34 rom the pipe 40.

I claim y 1. Device for; gas burners for preventing the escape of unburnt gas comprising a liquid tank, gas inletrand outlet connections opening above thev liquid in said tank, a

of' liquid on the admission of liquid outflow connection enabling the escape e gas to t space above the 'liquid in said tank, a float in said liquid, a gas cut olf member sup- 4the outflow of liquid from said tank, and

means for raising said float.

2. Device'for gas burners for preventing the escape of unburnt gas comprising a liquid tank, gas inlet and outlet connections opening above the liquid in said tank, a

liquid outflow connection enabling the escape of liquid on the admission of gas to the space above the liquid in said tank, a float in said liquid. a liquid seal ynormally perinitting the inlet andoutlet of gas, said float operating said liquid seal to cut oil' the gas supply on a diminution in the level of the liquid in said tank, a' thermostat actuated by the heat of the gas flame, means o erated Vby said thermostat for preventing t e outflow of liquid from said tank, and means for raising said lloat.

3.' A device for gas burners for preventing the escape of unburnt gas comprising a liquid tank, an inlet gas connection opening above the liquid in said tank, central inlet and out- 'let gas connections, a central liquid cup, a cap inverted over said cup, a liquid outflow connection enabling the escape of liquid on the admission of gas to the space above the liquid in said tank, a float in the liquid in said tank and supporting said cap, said float being lowered by a diminution in the level of the liquid in said tank so as to immerse said cap in the liquid in said cup' and thereby cut-oil' the gas supply, a thermostat actu ated by the heat of the gas flame, means operated by said thermostat for preventing they outllow of liquid from said tank, and means for raising said float. i

4. Device for gas burners for preventing the escape of unburnt gas comprising a liquid tank, gas inlet and outlet connections opening above the liquid in said tank, a liquid outflow connection enabling the escape'of liquid on the admission of gas to the space above the liquid in said tank, a iluid brake for braking the outflow of said liquid, a float in' said liquid, a gas cut off member sifipported by said float and adapted to cut o the gas supply on the diminution of the level of the liquid in said tank, a thermostat actuated by the heat of the gas llame, means operated by saidy thermostat for preventing the outflow of ,liquid from said tank, and means for raising said float.

5. Device for gas burners for preventing the escape of unburnt'gas, comprising a liquid tan opening above the liquid'in said tank, a liquid outflow connection enablin the escape .of liquid on the admission -o gas to the gas inlet and outlet connections space above the liquid in said tank, an air brake for braking the'outfiow of said liquid, a float in said liquid, a gas cut-ott membcr supported by said fioat and adapted to 5 cut ott' the gas supply on the diminution of .the level of the liquid in said tank, a th'er-.Z mostat actuated by the heatof the gas flame, means operated by said thermostat` for preventing the outflowT of liquid from said tank,

yand .means for raising said float.

6. A device for gas burners for preventing the escape of unburnt gas, comprising a liquid tank, a partition extending nearly to the bottom of said tank anddividing the tank into a main and a Asecondary compartment and leaving a restricted communication between said compartments, inlet and outlet gas connections to said main coms part-ment, a float inthe li uid in said main '20 compartment, a gas cut-o .device operated ibyv said float when the burner gas cock is opened and the levelof the liquid in ,Said main compartment diminished by the pressure of the gas entering said tank, an air outlet in ,said secondary compartment, a

thermostat actuated by the heat of the gasflame, means controlled by said thermostat.

.for preventing the escape of vair from said secondary compartment, and means for raising said float. v p 7-. A device for gasburners for preventing the escape of unburnt gas, comprising aliquid tank, a partition extendinnearly.

to the bottom of'said tank and viding 35 ,the tank into a main and a secondary compartment and leaving a restricted communicatlon between sald compartments, inlet and k outlet gas connections to said main com` partmenta' fioat in the li uid in said main 40 compartment, a gas cut-o device operated by said iloat When the burner gas cook is opened and the level ofthe liquid in' said main compartment diminished by the vpressure of the gas entering said tank, an air outlet in said secondary compartment, a closed chamber adapted 'to be heated-b the gas flame, piping from the said lclosed c amber, a looped pipe open to the liquid in said secondary compartment and connected to said piping, one arm of said looped pipe opening into .said'secondary compartment around said air outlet pipe, liquid in said looped pipe adapted to seal said air outlet, and means for raising'said iioat. 8. Device for gas'burners for preventing the escape of unburnt gas comprising a liquid tank, gas'inlet and outlet connections opening above the liquid' in said tank, a liquid outtiow connection enabling the escape` of liquid on the admission of gas to the space above the liquidin saidtank, a float in said liquid, .a gas cut oi member support ed by said float and adapted to cut oii the gas supply on the diminution of the level 'of the liquid in saidv tank, a thermostat actuated by the heat of the. gas flame, means operated by said thermostat Jfor preventing the outliow of liquid. from said tank and means for-raising said ioat comprising' a spindle extending through said tank for operating said bell-and a spring retaining said bell in the liquid.

9. Device for gas burners for preventing the eSCapeo-nnburnt gas comprising a liquid tank, a central inlet gas, pipe opening above the level ofthge liquid" in said tank, a central. outlet gas pipe surrdunding said inlet gas pipe and immersed #in the liquid in said tank, a liquid cup surrounding said central -inlet gas pipe, a cap inverted over said central inlet gas pipe, a plurality of inletgas' pipes around said liquid vcupl and opening into said tank above the iquid therein, a li uid outio connectiqnenablmg the escape'v o' liquid odiI the admission of gas to the space above the' liquid lin said tank, an annular float 'surrounding said inlet vgas pipes andsupport'ingl said cap, a thermostatv actuated by the heat of the gas ame, means. o erated by said thermostat for preventing tie-outflowl of liquid from said tank and .means for raising said ioat. In Witness whereof I have hereunto set my hand in the presence of two witnesses.

FRIEDRICH HUTTENLOCHER. Witnesses f.

HENRY HASPER, l'VoLDEi/IAR HAUPT.

bellimmersed inthe liquid in said tank, a 7n 

